Compilare: main.cpp: In function 'int main()': main.cpp:32:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for( i = 0; i < v[a].size(); i++ ) { | ~~^~~~~~~~~~~~~ main.cpp:16:15: warning: unused variable 's' [-Wunused-variable] 16 | int n, m, s, i, a, b, x; | ^